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denis23 [38]
3 years ago
9

Sheila conducts an investigation to see how the amount of salt dissolved in water affects the density of the water. Which statem

ent best describes the correct plan for her procedure? The density and the amount of water are controls, and the amount of salt and the type of salt are variables. The amount of water and the amount of salt are controls, and the type of salt and the density are variables. The type of salt and the amount of water are controls, and the amount of salt and the density are variables. The type of salt and the density of water are controls, and the amount of salt and the amount of water are variables.
Biology
2 answers:
lakkis [162]3 years ago
8 0
The correct answer would be the third option. The correct plan for the experiment would be that the type of salt and the amount of water are controls, and the amount of salt and the density are variables. Sheila wants to know the affect of varying the amount of salt to the density so it is the density and the amount of salt that is being changed while the type of salt and the water are kept constant since they are not being investigated.
alina1380 [7]3 years ago
6 0

C. The type of salt and the amount of water are controls, and the amount of salt and the density are variables.

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yarga [219]
<span>The correct answer is Paramecia, Euglenoids, and Mold. These are all unicellular eukaryotic organisms. Mold may seem like one big piece but it's actually a bunch of unicellular organisms living together and constantly spreading over foor or similar things. They are most commonly predators.</span>
7 0
3 years ago
Read 2 more answers
According to Piaget, children have acquired the cognitive skill of conservation when they're able to
tatuchka [14]

Answer:

The question lacks options, the options are:

A. understand the viewpoint of other people.

B. realize that the term heavy describes an object one way and the term big describes it another way

C. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal.

The answer is C

Explanation:

Piaget proposed the theory of cognitive development, which talks about how human intelligence is developed. Piaget worked with Children because he believed they played a significant role in the development of cognitive intelligence. Based on his work, he proposed four stages of cognitive development viz: sensorimotor, preoperational, concrete operational and formal operational stages.

However, in the preoperational stage, Piaget described children between ages 2-7 as being in this stage of cognitive development where they are yet to comprehend mental logic. One characteristics of this stage is CONSERVATION, which is the ability to know that changing a substance's appearance doesn't change the properties of that substance. Piaget proposed that Children between the ages of 2-7 lacked this conservative characteristics.

He performed an experiment where he used two beakers with the same amount of liquid. He then emptied the contents of one of the previous beakers into a new beaker with different shape (longer). Piaget was able to notice that Children at the pre-operational stage were unable to understand that the contents of the two beakers (longer one and previous beaker) were still the same despite the beaker has been changed.

Hence, according to Piaget, a child has acquired the cognitive skill of conservation when he/she is able to understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal.

3 0
3 years ago
Chondroblasts ________. Chondroblasts ________. are mature cartilage cells located in spaces called lacunae never lose their abi
Mariulka [41]

Answer:

within the cartilage divide and secrete new matrix

Explanation:

Chondroblasts also called as perichondrial cells form chondrocytes which are the cells of cartilage. They also secrete the cartilage matrix which forms the cartilage. This matrix consists of collagen, fibers, proteoglycans, hyaluronic acid, water and glycoproteins.

They divide within the formed cartilage too to secrete new matrix. They are called chondrocytes when they become a part of cartilage matrix. Here they grow the cartilage matrix by secreting more extracellular matrix rather than dividing. Once the cartilage formation is completed it is composed 10-20% of collagen fibers, 65-80% of water and rest is made by proteoglycan-hyaluronic acid aggregates.

6 0
3 years ago
In which case would a scientist choose to use a dissecting microscope rather than a compound
andreev551 [17]
It would be A and B .
6 0
3 years ago
What does a Euglena require to exhibit phototactic behavior?
pentagon [3]

Answer:

C

Explanation:

Phototaxis (phototactic response) is the cellular behavior in which cells swim toward or away from the light source. The euglena have eyespots that detect light so that it can move toward sunlight for photosynthesis.

3 0
2 years ago
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